docs: def get_blocked_ips():
      """ get a list of blocked ips from redis """
      if config.DISABLE_IP_LOCKOUT:
          # There are no blocked IP's since we disabled them.
          return []
      key = get_ip_blocked_cache_key("*")
      key_list = [redis_key.decode('utf-8')
                  for redis_key in REDIS_SERVER.keys(key)]
      return strip_keys(key_list)